Low Overpotential in Vacancy-Rich Ultrathin CoSe 2 Nanosheets for Water Oxidation
University of Science and Technology of China · Hefei National Center for Physical Sciences at Nanoscale · +1 more institution
Abstract
According to Yang Shao-Horn's principle, CoSe2 is a promising candidate as an efficient, affordable, and sustainable alternative electrocatalyst for the oxygen evolution reaction, owing to its well-suited electronic configuration of Co ions. However, the catalytic efficiency of pure CoSe2 is still far below what is expected, because of its poor active site exposure yield. Herein, we successfully overcome the disadvantage of insufficient active sites in bulk CoSe2 by reducing its thickness into the atomic scale rather than any additional modification (such as doping or hybridizing with graphene or noble metals). The positron annihilation spectrometry and XAFS spectra provide clear evidence that a large number…
Citation impact
- FWCI
- 28.40
- Percentile
- 100%
- References
- 41
Authors
12- YLYouwen LiuCorresponding
University of Science and Technology of China, Hefei National Center for Physical Sciences at Nanoscale
- HCHao Cheng
University of Science and Technology of China, National Synchrotron Radiation Laboratory
- MLMengjie Lyu
University of Science and Technology of China, Hefei National Center for Physical Sciences at Nanoscale
- SFShaojuan Fan
University of Science and Technology of China
- QLQinghua Liu
University of Science and Technology of China, National Synchrotron Radiation Laboratory
Topics & keywords
- Chemistry
- Overpotential
- Vacancy defect
- Chemical engineering
- Nanotechnology
- Inorganic chemistry
- Physical chemistry
- Crystallography